spawn 与 'static

  error[E0373]: async block may outlive the current function, but it borrows `name`, which is owned by the current function
   --> src/main.rs:4:26
    |
  4 |     let h = tokio::spawn(async { println!("hello {}", name); });
    |                          ^^^^^                        ---- `name` is borrowed here
    |                          |
    |                          may outlive borrowed value `name`
    |
    = note: async blocks are not executed immediately and must either take a reference or ownership of outside variables they use
  help: to force the async block to take ownership of `name` (and any other referenced variables), use the `move` keyword
    |
  4 |     let h = tokio::spawn(async move { println!("hello {}", name); });
    |                                ++++
  For more information about this error, try `rustc --explain E0373`.
  error: could not compile `u100a` (bin "u100a") due to 1 previous error

  编译退出码 0
  ① move 进任务,任务拥有它: tokio
  ② 3 个任务共享 Arc<Vec>:[10, 20, 30](strong_count = 1)
  ③ clone 之后原来的 name 仍然可用: tokio

  编译退出码 0
  join! 里的两个 async 块借用了 name 和 data:tokio 长度 5 / 6;name 与 data 之后仍然可用: tokio [1, 2, 3]

  error[E0597]: `local` does not live long enough
   --> src/main.rs:7:28
    |
  7 |     let local = 5; let r = &local;
    |         -----              ^^^^^^ borrowed value does not live long enough
    |         |
    |         binding `local` declared here
  8 |     needs_static(r);
    |     --------------- argument requires that `local` is borrowed for `'static`
  9 | }
    | - `local` dropped here while still borrowed
    |
  note: requirement that the value outlives `'static` introduced here
   --> src/main.rs:1:20

  编译退出码 0
  任务内部借用自己的 v,跨 await 也没问题:10